Postflop: cbet versus the nitty guy is perfectly fine as we want him to fold his pairs.

The turn is pretty ugly because someone like him will rarely ever raise anything that's not the nuts. So we are looking at some fullhouses, maybe some QTs and rarely a hand like KQ/KT. So I agree with your line here and it's a cry fold.

So he is a nit and AK he couldnt have in his hand because i expected him to 3b preflop. So on flop only KJ beats us.
Do you think he slowplayed his AK preflop?
Dont you see him raising turn with trips?